settings changed wont save after reboot

May sound silly, but are you sure you're not logging in as the 'Guest' user? What privileges does the user account you're using have? Check in

 > System Preferences... Users & Groups

that the account you're using is Admin. If you're using a Standard account, are parental controls enabled?

If you are admin, try resetting your permissions and removing the sys pref property file. Before you do that, backup your system and user data. Once you're backed up, open Terminal and copy/paste the following into the Terminal window:

rm ~/Library/Preferences/com.apple.systempreferences.plist

hit 'return'. If the prompt returns without an error (as it should), paste this

sudo chown -R `id -un` ~

hit 'return'. Enter your password as requested, but type carefully as it will be invisible while you do.

This will take a while, but after the command finishes (i.e., when the prompt returns), restart the mac.

After the restart, set the mac up the way you want, then test whether the problem is fixed by restarting again to see if your changes were kept.

burn1nator wrote:

When i try to do rm ~/Library/Preferences/com.apple.systempreferences.plist it tells me Permission Denied

The second command I posted should fix that. I should probably have suggested you did that one first! 😉